Dust and cinder screen for passenger-coach windows.



J. MORRISON. DUST AND OINDBR SCREEN FOB. PASSENGER COACH WINDOWS.

APPLICATION FILED MAR. 7, 1913.

1,070,981 K Patented Aug. 19, 1913.

I 1 van/11,

James Margie 0/? UNITED STATES PATENT GFFICE.

JAMES MORRISON, OF MONTREAL, QUEBEC, CANADA.

DUST AND CINDER SCREEN FOR, PASSENGER-COACH WINDOWS.

To aZZ'whom it may concern Be it known that I, JAMES MORRISON, a subject of the King of Great Britain, residing at the city of Montreal, in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Dust and Cinder Screens for Passenger-Coach Vindows; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates particularly to screens for use on the outside of passenger coaches to intercept sparks, cinders, dust and the like for the purpose of enabling passengers to keep the window open and have unobstructed view and effective ventilation without being annoyed by cinders etc.

The invention consists of a pair of flat rigid woven wire screens mounted within the car frame adjacent to the windows and adapted to be slid outwardly by means within the car and operated by employees or passengers. For full comprehension, however, of my invention reference must be had to the accompanying drawings forming a part of this specification in which similar reference characters indicate the same parts, and wherein:

Figure 1 is an outside elevation of a portion of a coach with the window casement broken away to show screen operating means at one side of the window; Fig. 2 is a vertical sectional view on line A A Fig. 1 of the window casement and sash with the screen illustrated in dotted lines, extended; Fig. 3 is a horizontal sectional View taken on line B B Fig. 1; and Fig. 4 is a transverse horizontal sectional view taken on line C C Fig. 2 and illustrating particularly means for operating and guiding the screen. Fig. 5 is an inside elevation of the deck sash portion of the car frame illustrating particularly the means for operating the screens mounted therein. Fig. 6 is a detail horizontal sectional view of the outer portion of the box and screen the latter being shown as in the act of being moved inwardly.

Heretofore considerable difficulty has been experienced in obtaining ventilation in passenger cars whether of the day coach or sleeper type owing to the fact that when the windows are raised and the usual screens filling in the opening are set in place practically no air enters and if these screens are not used cinders and dust are admitted.

Specification of Letters Patent.

Application filed. March 7, 1913.

Patented A11 '.*19,1913. Serial No. 752,647.

Solid screens extending at right angles to the car sides have been tried but they cause a suction owing to their solid nature which causes cinders and dirt to be driven into the car through the window opening. I have discovered that by using a perforated screen extending at right angles to the car side and forward of the window the air passing through the perforations while not entirely preventing the suction reduces it sufiiciently to cause a gentle draft inward through the open window and at the same time sufficient air passes through the perforations of the screen to cause the cinders, dust, and other particles to impinge upon the screen from which they fall.

The window frame is indicated at b, and the sliding sash at 0.

A pair of vertically arranged rigid woven wire screens 2 are disposed at opposite sides of the window in vertical boxes 3 having slits 4: through which the front edge of the screen protrudes while this protruding edge has secured thereto a bar or facing strip 5 of the same material as the frame of the car. Each of these screens consists of an oblong rectangular metal frame of T-crosssect-ion braced diagonally by bars 6 and also braced by a tubular nut 7 performing the additional function of a part of the means for operating the screen, the outer end of this tubular nut being rabbeted and provided with an attachment piece 8 soldered or otherwise rigidly connected thereto and by means of which the tube is rigidly connected to the outer frame bar 9 of the screen, this last connection being also preferably a soldered joint. The inner end of the tubular nut is rigidly connected to the inner frame bar 90 of the screen and to the inner ends of the diagonal brace 6, a ring 10 serving to strengthen this joint and being adapted to engage the sides of the slit 4 and prevent complete displacement of the screen from its box. The nut is formed by a brass or other suitable metal sleeve 11 containing a Babbitt metalbushing 12 tapped throughout its length and rigidly secured therein. The interior of the car frame has a central perforated circular dished plate 14 countersunk therein in the axial line of the tubular nut, and a screw 15 is rotatably mounted in this plate and prevented from axial displacement by a pair of collars 16 mounted rigidly on the screw at opposite sides of the plate, the inner end of the screw protruding a short distance into the car and being square to receive an operating handle 17 or a pinion to be presently further described while the outer end thereof engages within the tubular nut. The thread of this screw corresponds with the thread of the nut and is preferably of wide pitch.

The box 3 is preferably of sheet metal tinned or galvanized and provided with an inclined bottom 18 extending to an opening 19 beneath the level of the window sill 20 and the edge of the slit 4 away from the window is provided with a strip 25 (Fig. 4) of felt or other suitable material for cleaning the surface of the screen as the latter moves into the box. The bottom flange is cut away at one side of the screen as at to permit dust and cinders to fall onto the inclined floor 18 when the screen. is in closed position.

The operating means just described is suitable for the screens of the lower windows.

The deck sash frames are provided with similar screens, the screws thereof however are for convenience operated in unison and from the ends of the car. For this purpose each upper screw has a pinion 50 mounted rigidly thereon, and operatively engaged by a rack 51, the racks being united in series by wires or bars 52, the respective end racks having flexible wires 53 and 54 connected thereto and hung over pulleys 55, handles 56 being attached to the depending ends of the latter. By pulling wire 53 the pinions 50 and screws are rotated in the direction necessary to move the screens out, and by pulling wire 54 the screens are returned.

Gperation: The employee or passenger will operate the screen in advance of the window to be opened. Before opening the window the handle 17 should be operated or wire 53 pulled, thus moving the screen out of this box, and the ring 10 coming into contact with the edges of the slit 4 prevents further rotation of the handle and movement of pulley wire 53 when the screen is in proper position. The window may then be opened and the cinders and other particles which would otherwise be drawn into the window opening will be filtered out of the air reaching the latter; and the amount of air passing through the screen will be sufficient to prevent the suction caused by the screen from carrying dust and other particles around the latter into the window opening. Cinders or other particles finding their way into the boxes 3 will be caused by the vibration of the car to fall out through the opening 19.

WVhatI claim is as follows 1. The combination with the window casement and movable sash of a passenger coach such casement containing a space to accommodate a screen, of a perforated flat rigid cinder screen disposed within the space and at right angles to the side of the coach and means within the coach operatively connected to the screen for sliding the same out of and into the said space in the easement.

2. The combination with the window casement and movable sash of a passenger coach, such casement containing a space to accom' modate a screen, of a perforated flat rigid cinder screen disposed within the space and at right angles to the side of the coach, and a nut rigidly connected to the screen, a screw rotatably mounted within the space in the window casement and engaging the nut, means for preventing axial displacement of the screw and means whereby the screw is rotated.

3. The combination with the window casement and movable sash of a passenger coach such casement containing a space to accommodate a screen, of a perforated flat rigid cinder screen disposed within the space and at right angles to the side of the coach, and a tubular nut extending transversely to the screen and rigidly connected thereto, a screw rotatably mounted within the space in the window casement and engaging the tubular nut, means for preventing axial displacement of the screw and means whereby the screw is rotated.

4. The combination with the window casement and movable sash of a passenger coach, of a box mounted within and disposed at right angles to the side of the coach, a perforated flat rigid cinder screen located within and guided by the box, a tubular nut extending transversely to the screen and rigidly connected thereto, a screw rotatably mounted within the box and engaging the tubular nut, means for preventing axial displacement of the screw and means whereby the screw is rotated.

5. The combination with the window casement and movable sash of a passenger coach, such casement having an opening, of a box mounted within the easement the bottom of the box being outwardly inclined and communicating with the said opening in the casement, a cinder screen within the box, a nut rigidly connected to the screen, a screw rotatably mounted within the box and engaging the nut, means for preventing axial displacement of the screw and means whereby the screw is rotated.

6. The combination with the window casement and movable sash of a passenger coach such casement having an opening, of a box mounted within the easement the movable bottom of the box being outwardly inclined and communicating with the said opening in the easement, a perforated fiat rigid cinder screen disposed at right angles to the side of the coach, a tubular nut extending transversely to the screen and rigidly conname to this specification in the presence of nected thereto, a screw rotatably mounted two witnesses. within the box and engaging the tubular nut, means for preventing axial displace- JAMES MORRISON ment of the screw and means whereby the Witnesses: screw is rotated. GORDON G. OooKE,

In testimony whereof I have signed my E. R. Pri'rs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

